<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索框及添加分类按钮 -->
      <el-row :gutter="20"> 
        <el-col :span="8">
          <el-input placeholder="请输入内容" 
                    v-model.trim="queryInfo.query" 
                    clearable 
                    @change="searchGoods">
            <el-button slot="append" icon="el-icon-search" @click="searchGoods"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddPage">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- table表格区域 -->
      <el-table :data="goodslist" border stripe max-height="600">
        <el-table-column type="index" label="序号" width="60"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)" prop="goods_price" width="100"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="70"></el-table-column>
        <el-table-column label="创建时间" width="140">
          <template v-slot="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="130">
          <template v-slot="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="editById(scope.row.goods_id)"></el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        background>
      </el-pagination>


    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',  // 搜索内容
        pagenum: 1,
        pagesize: 10
      },
      // 商品列表
      goodslist: [],
      // 总数据条数
      total: 0,

    }
  },
  created() {
    this.getGoodaList()
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodaList() {  
      const {data:res} = await this.$axios.get('goods',{ params: this.queryInfo })
      if(res.meta.status !== 200) {
        return this.$message.error('获取商品数据失败')
      }
      console.log(res.data);
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    // 监听 pagesize 改变
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodaList()
    },
    // 监听 pagenum 的改变
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodaList()
    },
    //在点击搜索按钮 或 触发搜索框change事件（回车或失去焦点）时
    // 将页码重置后，发起请求获取商品
    searchGoods() {
      this.queryInfo.pagenum = 1
      this.getGoodaList()
    },
    // 根据 id 删除商品数据
    async removeById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品，是否继续？','提示',{
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if(confirmResult !== 'confirm'){
        return this.$message.info('已取消删除')
      }
      // 没有return，表示确实要删除，发起删除请求
      const {data:res} = await this.$axios.delete(`goods/${id}`)
      if(res.meta.status !== 200) {
        return this.$message.error('删除商品失败')
      }
      this.$message.success('删除商品成功')
      this.getGoodaList()
    },
    // 点击添加商品按钮，通过编程式导航跳转商品添加页面
    goAddPage() {
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang="less" scoped>

</style>